[PATCH] staging: rtl8192e: Use kzalloc rather than kmalloc v2

[Thomas Meyer]

Use kzalloc rather than kmalloc followed by memset with 0

This considers some simple cases that are common and easy to validate
Note in particular that there are no ...s in the rule, so all of the
matched code has to be contiguous

The semantic patch that makes this change is available
in scripts/coccinelle/api/alloc/kzalloc-simple.cocci.

Signed-off-by: Thomas Meyer <thomas at m3y3r.de>
---

diff -u -p a/drivers/staging/rtl8192e/rtllib_softmac.c b/drivers/staging/rtl8192e/rtllib_softmac.c
--- a/drivers/staging/rtl8192e/rtllib_softmac.c 2011-11-07 19:38:11.780313813 +0100
+++ b/drivers/staging/rtl8192e/rtllib_softmac.c 2011-11-08 09:40:07.649215930 +0100
@@ -3048,10 +3048,9 @@ void rtllib_softmac_init(struct rtllib_d
 	ieee->state = RTLLIB_NOLINK;
 	for (i = 0; i < 5; i++)
 		ieee->seq_ctrl[i] = 0;
-	ieee->pDot11dInfo = kmalloc(sizeof(struct rt_dot11d_info), GFP_ATOMIC);
+	ieee->pDot11dInfo = kzalloc(sizeof(struct rt_dot11d_info), GFP_ATOMIC);
 	if (!ieee->pDot11dInfo)
 		RTLLIB_DEBUG(RTLLIB_DL_ERR, "can't alloc memory for DOT11D\n");
-	memset(ieee->pDot11dInfo, 0, sizeof(struct rt_dot11d_info));
 	ieee->LinkDetectInfo.SlotIndex = 0;
 	ieee->LinkDetectInfo.SlotNum = 2;
 	ieee->LinkDetectInfo.NumRecvBcnInPeriod = 0;
diff -u -p a/drivers/staging/rtl8192e/rtllib_crypt_wep.c b/drivers/staging/rtl8192e/rtllib_crypt_wep.c
--- a/drivers/staging/rtl8192e/rtllib_crypt_wep.c 2011-11-07 19:38:11.773647045 +0100
+++ b/drivers/staging/rtl8192e/rtllib_crypt_wep.c 2011-11-08 09:40:08.842565261 +0100
@@ -38,10 +38,9 @@ static void *prism2_wep_init(int keyidx)
 {
 	struct prism2_wep_data *priv;
 
-	priv = kmalloc(sizeof(*priv), GFP_ATOMIC);
+	priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
 	if (priv == NULL)
 		goto fail;
-	memset(priv, 0, sizeof(*priv));
 	priv->key_idx = keyidx;
 
 	priv->tx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
diff -u -p a/drivers/staging/rtl8192e/rtllib_crypt_ccmp.c b/drivers/staging/rtl8192e/rtllib_crypt_ccmp.c
--- a/drivers/staging/rtl8192e/rtllib_crypt_ccmp.c 2011-11-07 19:38:11.773647045 +0100
+++ b/drivers/staging/rtl8192e/rtllib_crypt_ccmp.c 2011-11-08 09:40:09.422573035 +0100
@@ -63,10 +63,9 @@ static void *rtllib_ccmp_init(int key_id
 {
 	struct rtllib_ccmp_data *priv;
 
-	priv = kmalloc(sizeof(*priv), GFP_ATOMIC);
+	priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
 	if (priv == NULL)
 		goto fail;
-	memset(priv, 0, sizeof(*priv));
 	priv->key_idx = key_idx;
 
 	priv->tfm = (void *)crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC);
diff -u -p a/drivers/staging/rtl8192e/rtllib_crypt.c b/drivers/staging/rtl8192e/rtllib_crypt.c
--- a/drivers/staging/rtl8192e/rtllib_crypt.c 2011-11-07 19:38:11.773647045 +0100
+++ b/drivers/staging/rtl8192e/rtllib_crypt.c 2011-11-08 09:40:09.789244618 +0100
@@ -104,11 +104,10 @@ int rtllib_register_crypto_ops(struct rt
 	if (hcrypt == NULL)
 		return -1;
 
-	alg = kmalloc(sizeof(*alg), GFP_KERNEL);
+	alg = kzalloc(sizeof(*alg), GFP_KERNEL);
 	if (alg == NULL)
 		return -ENOMEM;
 
-	memset(alg, 0, sizeof(*alg));
 	alg->ops = ops;
 
 	spin_lock_irqsave(&hcrypt->lock, flags);
@@ -202,11 +201,10 @@ int __init rtllib_crypto_init(void)
 {
 	int ret = -ENOMEM;
 
-	hcrypt = kmalloc(sizeof(*hcrypt), GFP_KERNEL);
+	hcrypt = kzalloc(sizeof(*hcrypt), GFP_KERNEL);
 	if (!hcrypt)
 		goto out;
 
-	memset(hcrypt, 0, sizeof(*hcrypt));
 	INIT_LIST_HEAD(&hcrypt->algs);
 	spin_lock_init(&hcrypt->lock);
 
diff -u -p a/drivers/staging/rtl8192e/rtllib_crypt_tkip.c b/drivers/staging/rtl8192e/rtllib_crypt_tkip.c
--- a/drivers/staging/rtl8192e/rtllib_crypt_tkip.c 2011-11-07 19:38:11.773647045 +0100
+++ b/drivers/staging/rtl8192e/rtllib_crypt_tkip.c 2011-11-08 09:40:13.429293412 +0100
@@ -60,10 +60,9 @@ static void *rtllib_tkip_init(int key_id
 {
 	struct rtllib_tkip_data *priv;
 
-	priv = kmalloc(sizeof(*priv), GFP_ATOMIC);
+	priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
 	if (priv == NULL)
 		goto fail;
-	memset(priv, 0, sizeof(*priv));
 	priv->key_idx = key_idx;
 	priv->tx_tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0,
 			CRYPTO_ALG_ASYNC);
diff -u -p a/drivers/staging/rtl8192e/rtllib_wx.c b/drivers/staging/rtl8192e/rtllib_wx.c
--- a/drivers/staging/rtl8192e/rtllib_wx.c 2011-11-07 19:38:11.783647197 +0100
+++ b/drivers/staging/rtl8192e/rtllib_wx.c 2011-11-08 09:40:14.075968748 +0100
@@ -368,11 +368,10 @@ int rtllib_wx_set_encode(struct rtllib_d
 		struct rtllib_crypt_data *new_crypt;
 
 		/* take WEP into use */
-		new_crypt = kmalloc(sizeof(struct rtllib_crypt_data),
+		new_crypt = kzalloc(sizeof(struct rtllib_crypt_data),
 				    GFP_KERNEL);
 		if (new_crypt == NULL)
 			return -ENOMEM;
-		memset(new_crypt, 0, sizeof(struct rtllib_crypt_data));
 		new_crypt->ops = rtllib_get_crypto_ops("WEP");
 		if (!new_crypt->ops) {
 			request_module("rtllib_crypt_wep");